Miyakita T, Miura H
Int Arch Occup Environ Health. 1985;55(4):285-93. doi: 10.1007/BF00377687.
A new method for estimating critical bandwidth in AR has been developed. The reflex activating sounds (RAS) consisted of a 1000 Hz pure tone, and thirteen kinds of noise centered on 1000 Hz with bandwidths of 100, 250 and 1/3-octave frequencies in 500 to 1000 Hz. A two-phase linear regression model was fitted to the sets of data which showed the relationships between the magnitude of acoustic reflex (AR) and bandwidth of RAS. The existence of a critical bandwidth was confirmed in 81 subjects with normal hearing acuity. The effects of bandwidth on magnitude of AR was not observed in two subjects, so critical bandwidth (CBW) was estimated at greater than or equal to 4000 Hz in their cases. The median value of CBW in AR was 1138 Hz in 83 subjects. Our new method, designed for practical use, may be a useful tool for estimating the critical bandwidth in AR.
一种用于估计听觉反射（AR）临界带宽的新方法已经开发出来。反射激活声音（RAS）由一个1000赫兹的纯音以及13种以1000赫兹为中心、带宽分别为100、250赫兹以及在500至1000赫兹范围内1/3倍频程频率的噪声组成。将一个两相线性回归模型拟合到显示听觉反射（AR）幅度与RAS带宽之间关系的数据集中。在81名听力正常的受试者中证实了临界带宽的存在。在两名受试者中未观察到带宽对AR幅度的影响，因此在他们的案例中，临界带宽（CBW）估计大于或等于4000赫兹。在83名受试者中，AR中CBW的中位数为1138赫兹。我们为实际应用设计的新方法可能是估计AR临界带宽的有用工具。
